Glass formation and conductivity in the Ag2SAgPO3 system: Evidence against cluster pathway mechanisms for high ionic conductivity

J. Liu, J. Portier, B. Tanguy, J. J. Videau, C. A. Angell

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18 Scopus citations

Abstract

The glassforming region in the system Ag2SAgPO3 has been determined and studies of electrical conductivity, infrared absorption, thermal expansion and transport number of Ag+ ions have been made. The results of the electrical conductivity and the transport number measurements show that the conduction is essentially ionic in nature and due to silver ions alone. In this system, as in AgIAgPO3, the logarithm of the ionic conductivity increases linearly with increasing Ag2S mole fraction and extrapolates to the value of the superionic crystalline Ag2S. However, an explanation similar to the α-AgI cluster pathway model proposed for AgI-containing systems is not tenable since IR spectra show that Ag2S dissolves by an acid-base chemical ordering process to give shorter phosphate chain structures which approach the pyrophosphate stoichiometry at the glassforming limit.

Original languageEnglish (US)
Pages (from-to)87-92
Number of pages6
JournalSolid State Ionics
Volume34
Issue number1-2
DOIs
StatePublished - Apr 1989

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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